Very quick tut on using 'curve to terrain'

1) Here is a simple 3x3 curve patch, bent at 90 degree.



To make any geometry 'fit' to this curve properly, without gaps, you need all the vertices on the grid.



2 ) Using ctrl+g to snap points to grid gives this.


It snaps the control verts of the curve, but not the verts of the triangles that make the curve.


Obviously, fairly useless for making exact fitting geometry


3) Now, take the same curve from picture 1, select it and go to patch menu -> curve to terrain.

It appears that nothing has happened


4) If you now press ctrl+g to snap the curve to the grid, you'll see that each triangle vert is exactly on the grid.



5) Now you can create perfect fitting geometry

thanks.

Thanks Peri.

Just to add or to clarify your last step....

What I did was put a block of texture brush along the inside of the curve and then used the clipper tool to cut along the inside edges of the curve to match everything up.

Is this what we do or you did?

edited on Mar. 26, 2008 01:42 pm by LPRay

I have taken this one step further as well. I turned the wall with the grass on top to a true wall with the grass dropped down to the road level or there abouts.

That looks beautiful =D

Yes, it was just to show how to convert a curve into something you could add 'proper' geometry to. Use it to makes curbs fit roads, walls fit paths, walls to fit arches etc etc :)

Thank you sir!!! I begin to see the light.

how do get the curve in the patch?

Here is the more finished look of what I was playing with.






The wall with the grass was made by placing a solid brush as high as the wall height required over top of the inner part of the curved road. Once I did that I duplicated that block and pulled it out of the way and reduced the height of it to about 4 units. This duplicate would eventually be my grass.

Then I went back to the tall wall block and simply used the clipper tool at the depth away from the road that I wanted and clipped using the vertices that made up the inner line of the curve. Once finished I discarded the remaining part of the initial block brush.

Then I slid the thin grass brush up against the wall that I just created and repeated the process.

For the upper patch portion I made a simple terrain patch 7x7 or something close to that and then simply pulled the vertices along or near the wall into the wall.

The big grey wall I built the same way but clipped the outer side against the outer part of the curved road. This was a bit more time consuming than the initial wall to do but the same procedure. I kept the bigger portion of the initial brush since I wanted to simulate a loading dock or whatever I wanted to do with it eventually. I could have clipped the rest of it away as well to make two walls of the same depth too.

Hope this helps to explain what I did.

Thanks again Peri!